package com.hsjk.szwj.framework.common.util.spring;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author chenjiawei
 * @desc Spring 框架下, 获取Beans静态函数方法。
 * @Date 2023/08/21 14:29
 **/
@Component
public class SpringBeansUtil implements ApplicationContextAware {
    private static ApplicationContext applicationContext = null;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringBeansUtil.applicationContext == null) {
            SpringBeansUtil.applicationContext = applicationContext;
        }
    }

    /**
     * 获取applicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean.
     */
    public static Object getBean(String name) {

        if (!getApplicationContext().containsBean(name)) {
            return null;
        }

        return getApplicationContext().getBean(name);

    }

    /**
     * 通过class获取Bean.
     */
    public static <T> T getBean(Class<T> clazz) {
        try {
            return getApplicationContext().getBean(clazz);
        } catch (BeansException e) {
            return null;
        }
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        if (!getApplicationContext().containsBean(name)) {
            return null;
        }
        return getApplicationContext().getBean(name, clazz);
    }
}
